. >>> directly between glasgow and edinburgh, scotland, is shotts, the farming village that dots the isle's central interior. but just beyond grazing sheep is a much more foreboding presence. this is hmp, her majesty's prison, shotts, a maximum security prison that houses more than 500 of scotland's most violent prisoners. >> all the prisoners will be serving fewer year -- four years and over that means they've committed a serious crime. 52% of the prisoners here now are serving a life sentence. most life sentences are given for murder. so we have a lot of murderers here. >> many of the men committed for murder here are in their 20s and claim drugs and alcohol led them to kill. drugs played a role in this man's crimes. and he made headlines. >> so you were a drug dealer? >> a drug dealer, aye. a wee bit. >> but hutchison was a drug dealer with a sadistic streak. he's serving a 25 to life sentence for two murders, attempted murder, kidnapping and torture. >> how did those two people die? >> one fell off a bridge and the other one died. >> one fell off a bridge. would that be an accide